Answer: 9
Step-by-step explanation:
4+6x+5=7x
-6x -6x
=
4+5=1x
9=1x
X=9
2/15+1/15=3/15 which isn't less than a half
2/15+8/30=2/15+4/15=6/15 which isn't less than a half
2/15+5/15=7/15 which isn't less than a half
and 2/15+8/15=10/15 which is greater than a half, and when cancelled down is 2/3 which is definitely greater than a half:)
6 because 6+7 is greater than 12
Answer:
The acceleration of the particle at any time t

Step-by-step explanation:
Given:
The position of a particle moving in a straight line at any time t is.

The velocity of the particle 



So the velocity of the particle 
The acceleration of the particle 


In this condition the acceleration does not depending upon the time, so the acceleration is constant
Therefore the acceleration of the particle at any time t